Aerobic Respiration

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Aerobic Respiration

• The Electron Transport Chain
• Oxidative Phosphorylation

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The Electron Transport Chain

• the final stage of aerobic cellular respiration
• most of the energy from the original glucose
  molecule is transferred to ATP molecules during
  this stage
• takes place on the inner membrane of the
  mitochondrion

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Electron Transport Chain
4
Electron Transport Chain
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Lets watch a movie

• http//vcell.ndsu.edu/animations/etc/movie-flash.h
  tm

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Summary
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ATP Synthase Complex
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Oxidative Phosphorylation
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Theoretical Energy Yield

• Glycolysis Substrate-level phosphorylation 2 ATP
• 2 NADH ? 2 FADH2 4 ATP
• ( or ? 2 NADH) (6 ATP)
• Pyruvate
• Oxidation 2 NADH ? 6 ATP
• Krebs Cycle Substrate-level phosphorylation 2
  ATP
• 6 NADH ? 18 ATP
• 2 FADH2 ? 4 ATP
•  
• TOTAL 36 ATP (38 ATP)

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Actual Yield lt 38 ATP

• inexact ratio of NADH and FADH2 to ATP
• use of glycerol-phosphate shuttle vs.
  malate-aspartate shuttle
• uncoupling of electron transport and chemiosmosis
• energy of H flow might be used to power other
  processes

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Animations

• Simple clear animation with narration
• http//highered.mcgraw-hill.com/sites/0072437316/s
  tudent_view0/chapter9/animations.html
•  
• Excellent step-by-step animation
• http//www.science.smith.edu/departments/Biology/B
  io231/etc.html

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Lets visit the Khan Academy

• excellent lesson on the Electron Transport Chain
• http//www.khanacademy.org/video/electron-transpor
  t-chain?playlistBiology

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Additional Animations

• Step-by-step animation with explanations
• http//www.sp.uconn.edu/terry/Common/respiration.
  html
• If you are interested in the chemical structure
  of all of the molecules involved, watch this
  animation series
• http//www.johnkyrk.com/mitochondrion.html